<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <ul id="parent">
        <li>1</li>
        <li>2</li>
        <li>3</li>
    </ul>
    <script>
        /* 
        childNodes-->所有类型的子节点
        ie9一下 将childNodes识别为元素节点
        children-->只获取元素子节点
         */
        var childs=document.getElementById("parent").childNodes;
        var childEle=document.getElementById("parent").children;
        // console.log(childs.length);
        // alert(childs.length);
        for(var i=0;i<childs.length;i++){
            if(childs[i].nodeType==1){
                childs[i].style.color="red";
            }
        }
    </script>
</body>
</html>